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ALSA: hwdep: Return -ENODEV instead of -EFAULT in snd_hwdep_open()

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When try_module_get() fails in snd_hwdep_open(), the owning module is
going away and the device is no longer usable, so -EFAULT ("bad address")
is the wrong error. Return -ENODEV, matching the other unavailable-device
paths in this function(the NULL hw check and the card->shutdown check).
This changes the errno reported to userspace on this rare race.
No other behaviour changes.

Signed-off-by: bui duc phuc <phucduc.bui@gmail.com>
Reviewed-by: Cezary Rojewski <cezary.rojewski@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260707084506.718583-3-phucduc.bui@gmail.com
This commit is contained in:
bui duc phuc 2026-07-07 15:45:02 +07:00 committed by Takashi Iwai
parent b45f4e8d78
commit c49e88ea6c
1 changed files with 1 additions and 1 deletions
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2
sound/core/hwdep.c
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@ -87,7 +87,7 @@ static int snd_hwdep_open(struct inode *inode, struct file * file)
if (!try_module_get(hw->card->module)) {
snd_card_unref(hw->card);
return -EFAULT;
return -ENODEV;
}
init_waitqueue_entry(&wait, current);